Question

(40179-15395:5)×4=
(90-42:3×2)÷2=
15×(54:3-84:7)

Answer 1

1)(40179-15395:5)×4=(40179-3079)*4=37100*4=148400
2)(90-42:3×2)÷2=(90-14*2)/2=(90-28)/2=62/2=31
3)15×(54:3-84:7)15*(18-12)=15-6=9